explorer.exe /select,c:～exmple.txt
http://support.microsoft.com/kb/314853/ja
https://www.betaarchive.com/wiki/index.php?title=Microsoft_KB_Archive/314853
void CXxxxDoc::OnExecExplorer()
{
CString docName = GetPathName() ;
ShellExec se ;
se.SetNon2QMark(TRUE) ;
se.SetFile(_T("explorer.exe")) ;
se.SetParamaters(_T("/e,/select,")+docName) ;
se.Execute() ;
}